334 lines
13 KiB
Plaintext
334 lines
13 KiB
Plaintext
/*
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*
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* Copyright (c) 2003
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* John Maddock
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*
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* Use, modification and distribution are subject to the
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* Boost Software License, Version 1.0. (See accompanying file
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* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*
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*/
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/*
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* LOCATION: see http://www.boost.org for most recent version.
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* FILE regex_token_iterator.hpp
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* VERSION see <boost/version.hpp>
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* DESCRIPTION: Provides regex_token_iterator implementation.
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*/
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#ifndef BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
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#define BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
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#include <boost/shared_ptr.hpp>
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#include <boost/detail/workaround.hpp>
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#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
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|| BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
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//
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// Borland C++ Builder 6, and Visual C++ 6,
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// can't cope with the array template constructor
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// so we have a template member that will accept any type as
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// argument, and then assert that is really is an array:
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//
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#include <boost/static_assert.hpp>
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#include <boost/type_traits/is_array.hpp>
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#endif
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namespace boost{
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#ifdef BOOST_MSVC
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#pragma warning(push)
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#pragma warning(disable: 4103)
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#endif
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_PREFIX
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#endif
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#pragma warning(push)
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#pragma warning(disable:4700)
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#endif
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template <class BidirectionalIterator,
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class charT,
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class traits>
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class regex_token_iterator_implementation
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{
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typedef basic_regex<charT, traits> regex_type;
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typedef sub_match<BidirectionalIterator> value_type;
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match_results<BidirectionalIterator> what; // current match
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BidirectionalIterator base; // start of search area
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BidirectionalIterator end; // end of search area
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const regex_type re; // the expression
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match_flag_type flags; // match flags
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value_type result; // the current string result
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int N; // the current sub-expression being enumerated
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std::vector<int> subs; // the sub-expressions to enumerate
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public:
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regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, int sub, match_flag_type f)
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: end(last), re(*p), flags(f){ subs.push_back(sub); }
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regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const std::vector<int>& v, match_flag_type f)
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: end(last), re(*p), flags(f), subs(v){}
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#if !BOOST_WORKAROUND(__HP_aCC, < 60700)
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#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
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|| BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
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|| BOOST_WORKAROUND(__HP_aCC, < 60700)
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template <class T>
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regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const T& submatches, match_flag_type f)
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: end(last), re(*p), flags(f)
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{
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// assert that T really is an array:
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BOOST_STATIC_ASSERT(::boost::is_array<T>::value);
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const std::size_t array_size = sizeof(T) / sizeof(submatches[0]);
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for(std::size_t i = 0; i < array_size; ++i)
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{
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subs.push_back(submatches[i]);
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}
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}
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#else
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template <std::size_t CN>
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regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const int (&submatches)[CN], match_flag_type f)
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: end(last), re(*p), flags(f)
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{
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for(std::size_t i = 0; i < CN; ++i)
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{
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subs.push_back(submatches[i]);
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}
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}
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#endif
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#endif
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bool init(BidirectionalIterator first)
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{
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N = 0;
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base = first;
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if(regex_search(first, end, what, re, flags, base) == true)
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{
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N = 0;
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result = ((subs[N] == -1) ? what.prefix() : what[(int)subs[N]]);
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return true;
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}
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else if((subs[N] == -1) && (first != end))
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{
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result.first = first;
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result.second = end;
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result.matched = (first != end);
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N = -1;
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return true;
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}
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return false;
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}
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bool compare(const regex_token_iterator_implementation& that)
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{
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if(this == &that) return true;
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return (&re.get_data() == &that.re.get_data())
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&& (end == that.end)
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&& (flags == that.flags)
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&& (N == that.N)
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&& (what[0].first == that.what[0].first)
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&& (what[0].second == that.what[0].second);
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}
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const value_type& get()
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{ return result; }
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bool next()
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{
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if(N == -1)
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return false;
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if(N+1 < (int)subs.size())
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{
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++N;
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result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
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return true;
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}
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//if(what.prefix().first != what[0].second)
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// flags |= /*match_prev_avail |*/ regex_constants::match_not_bob;
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BidirectionalIterator last_end(what[0].second);
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if(regex_search(last_end, end, what, re, ((what[0].first == what[0].second) ? flags | regex_constants::match_not_initial_null : flags), base))
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{
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N =0;
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result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
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return true;
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}
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else if((last_end != end) && (subs[0] == -1))
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{
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N =-1;
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result.first = last_end;
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result.second = end;
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result.matched = (last_end != end);
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return true;
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}
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return false;
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}
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private:
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regex_token_iterator_implementation& operator=(const regex_token_iterator_implementation&);
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};
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template <class BidirectionalIterator,
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class charT = BOOST_DEDUCED_TYPENAME BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::value_type,
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class traits = regex_traits<charT> >
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class regex_token_iterator
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#ifndef BOOST_NO_STD_ITERATOR
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: public std::iterator<
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std::forward_iterator_tag,
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sub_match<BidirectionalIterator>,
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typename BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::difference_type,
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const sub_match<BidirectionalIterator>*,
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const sub_match<BidirectionalIterator>& >
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#endif
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{
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private:
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typedef regex_token_iterator_implementation<BidirectionalIterator, charT, traits> impl;
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typedef shared_ptr<impl> pimpl;
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public:
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typedef basic_regex<charT, traits> regex_type;
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typedef sub_match<BidirectionalIterator> value_type;
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typedef typename BOOST_REGEX_DETAIL_NS::regex_iterator_traits<BidirectionalIterator>::difference_type
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difference_type;
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typedef const value_type* pointer;
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typedef const value_type& reference;
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typedef std::forward_iterator_tag iterator_category;
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regex_token_iterator(){}
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regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
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int submatch = 0, match_flag_type m = match_default)
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: pdata(new impl(&re, b, submatch, m))
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{
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if(!pdata->init(a))
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pdata.reset();
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}
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regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
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const std::vector<int>& submatches, match_flag_type m = match_default)
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: pdata(new impl(&re, b, submatches, m))
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{
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if(!pdata->init(a))
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pdata.reset();
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}
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#if !BOOST_WORKAROUND(__HP_aCC, < 60700)
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#if (BOOST_WORKAROUND(__BORLANDC__, >= 0x560) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x570)))\
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|| BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003)) \
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|| BOOST_WORKAROUND(__HP_aCC, < 60700)
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template <class T>
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regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
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const T& submatches, match_flag_type m = match_default)
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: pdata(new impl(&re, b, submatches, m))
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{
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if(!pdata->init(a))
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pdata.reset();
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}
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#else
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template <std::size_t N>
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regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
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const int (&submatches)[N], match_flag_type m = match_default)
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: pdata(new impl(&re, b, submatches, m))
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{
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if(!pdata->init(a))
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pdata.reset();
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}
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#endif
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#endif
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regex_token_iterator(const regex_token_iterator& that)
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: pdata(that.pdata) {}
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regex_token_iterator& operator=(const regex_token_iterator& that)
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{
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pdata = that.pdata;
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return *this;
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}
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bool operator==(const regex_token_iterator& that)const
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{
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if((pdata.get() == 0) || (that.pdata.get() == 0))
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return pdata.get() == that.pdata.get();
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return pdata->compare(*(that.pdata.get()));
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}
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bool operator!=(const regex_token_iterator& that)const
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{ return !(*this == that); }
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const value_type& operator*()const
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{ return pdata->get(); }
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const value_type* operator->()const
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{ return &(pdata->get()); }
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regex_token_iterator& operator++()
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{
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cow();
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if(0 == pdata->next())
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{
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pdata.reset();
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}
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return *this;
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}
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regex_token_iterator operator++(int)
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{
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regex_token_iterator result(*this);
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++(*this);
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return result;
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}
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private:
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pimpl pdata;
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void cow()
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{
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// copy-on-write
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if(pdata.get() && !pdata.unique())
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{
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pdata.reset(new impl(*(pdata.get())));
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}
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}
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};
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typedef regex_token_iterator<const char*> cregex_token_iterator;
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typedef regex_token_iterator<std::string::const_iterator> sregex_token_iterator;
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#ifndef BOOST_NO_WREGEX
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typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
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typedef regex_token_iterator<std::wstring::const_iterator> wsregex_token_iterator;
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#endif
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template <class charT, class traits>
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inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
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}
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template <class charT, class traits, class ST, class SA>
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inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
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}
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template <class charT, class traits, std::size_t N>
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inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
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}
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template <class charT, class traits, class ST, class SA, std::size_t N>
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inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
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}
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template <class charT, class traits>
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inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
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}
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template <class charT, class traits, class ST, class SA>
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inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
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{
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return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
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}
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#pragma warning(push)
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#pragma warning(disable: 4103)
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#endif
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#ifdef BOOST_HAS_ABI_HEADERS
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# include BOOST_ABI_SUFFIX
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#endif
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#ifdef BOOST_MSVC
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#pragma warning(pop)
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#endif
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} // namespace boost
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#endif // BOOST_REGEX_V4_REGEX_TOKEN_ITERATOR_HPP
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